NI PXIe-5694 Calibration Procedure
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© National Instruments
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13
7.
Connect the low-frequency combiner common connector to the spectrum analyzer RF
INPUT connector with the remaining SMA (m)-to-SMA (m) cable. Label the cable
DS
.
Figure 2.
Configuration for Power Level Correction Characterization
8.
Configure the spectrum analyzer as follows:
•
Center frequency: the first frequency listed in Table 4
•
Span: 0 Hz
•
Reference level: 10 dBm
•
Resolution bandwidth: 100 kHz
•
Video bandwidth: 300 kHz
•
Number of averages: 100
9.
Set RF source 2 to the same frequency configured for the spectrum analyzer in step 8.
10. Record the power level reading on the spectrum analyzer in the
Spectrum Analyzer
cell in
Table 4 corresponding to the appropriate frequency.
11. Repeat steps 8 through 10 for the remaining frequency listed in Table 4.
12. For each of the two frequencies in Table 4, subtract the value in the
Power Meter Reference
cell from the value in the
Spectrum Analyzer
cell and record it in the
Correction
cell.
1
RF Source 1
2
SMA (m)-to-SMA (m) Cable
3
10 dB Attenuator
4
Low-Frequency Combiner
5
RF Source 2
6
Spectrum Analyzer
1
6
5
2
2
3
4
